Carbothermal Preparation of Ultra-Fine TiB2 Powders Using Solution-Derived Precursors via Sol-Gel Method

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Ultra-fine titanium diboride (TiB2) powders have been prepared by carbothermal reduction reactions in TiO2-B2O3-C system using tetrabutyl titanate, boric acid and phenolic resin as the solution-derived precursors. The reactions were substantially completed at relatively lower temperature (<1400°C) and the resulting products had a smaller average crystallite size (< 200 nm). However, below 1100°C, titanium carbide was the predominant phase and the relative content decreased with the rise of temperature. The thermodynamic change in TiO2-B2O3-C system was mainly studied by TG-DTA and the mechanism of synthesis of TiB2 was discussed. The crystallite size and morphology of the synthesized powders were characterized by SEM and TEM.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

944-947

DOI:

10.4028/www.scientific.net/KEM.336-338.944

Citation:

Y. J. Yan et al., "Carbothermal Preparation of Ultra-Fine TiB2 Powders Using Solution-Derived Precursors via Sol-Gel Method", Key Engineering Materials, Vols. 336-338, pp. 944-947, 2007

Online since:

April 2007

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$35.00

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